314 Mr. O. Thomas on 



colour to ochraceous buff, while in massaicus they are buff or 

 cream buff. 



Other characters as in massaicus. 



Dimensions of the type (measured in flesh) : — 



Head and body 119 mm.; tail 123 ; hind foot 27 ; ear 17. 



Skull : greatest length 30*7 ; zygomatic breadth 14" 6 ; 

 length of upper tooth-row 5. 



Bab. Rombo, Kilimanjaro, 5000-6000'. 



Type. Adult male. B.M. no. 10. 7. 2. 119. Original num- 

 ber 1188. Collected 18th June, 1910, by R. Kemp. Pre- 

 sented by C. D. Rudd, Esq. 



Striped rats of the present group from various localities in 

 E. Africa, including Mt. Elgon, Mt. Ruwenzori, and Machakos, 

 all agree closely with each other in their general greyish 

 coloration and pale buffy feet, while the series from Rombo 

 are on the average much more warmly coloured, with brown 

 ground-colour, buffy stripes, and strongly buffy feet. As the 

 former undoubtedly represent massaicus, which was described 

 from Naivasha, the Kilimanjaro race needs a new subspecific 

 name. 



Just as the forms with continuous stripes may be looked 

 upon as subspecies of A. barbarus, so those with interrupted 

 and dotted lines may be considered subspecies of the W.- 

 African A. pulchellus, Gray. 



30. Thamnomys surdaster, Thos. & Wr. 



? . 1045. Taveta. 



<?. 1133; ?. 1181,1195. Rombo. 



These specimens agree in colour with the true Nyasa 

 surdaster rather than with the more grey-headed E. -African 

 form named by Mr. Osgood T. s. polionops. 



The Taveta specimen differs from the Rombo set in certain 

 details, but how far these are of importance can only be 

 settled by the study of further material. 



31. Acomys xoilsoni, Thos. 



<J. 1062,1104; ?. 1023, 1097, 1105. Taveta. 

 Also obtained at Voi in company with the newly described 

 A. ignitus, Dollm. 



32. Tachyoryctes daemon, Thos. 



$. 1109. Maranga, Kilimanjaro, 4000'. 

 cJ. 1125, 1127, 1135, 1136, 1169 ; ? . 1122, 1124, 1128, 

 1129, 1130, 1131, 1142, 1145, 1180. Rombo. 



